Political experience: United States Senator from South Carolina (2003 - ), member of the U.S. House of Representatives from South Carolina's 3rd district (1995-2003), member of the South Carolina House of Representatives, (1993-1995)

Political experience: Former governor of New York, former member of the New York Senate from the 37th district, former member of the New York State Assembly from the 91st district, former mayor of Peekskill

Political experience: Former governor of Texas (2000-2015), former lieutenant governor of Texas (1999-2000), former agricultural commissioner of Texas (1991-1999), member of the Texas House of Representatives (1985-1991)

Political experience: Current United States Senator, chairman of the Senate Committee on Veterans' Affairs (2013-2015), member of the U.S. House of Representatives (1991-2007), mayor of Burlington, Vermont (1981-1989)